Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 1478 insertions, 0 deletions

diff --git a/third_party/libwebrtc/api/stats/OWNERS b/third_party/libwebrtc/api/stats/OWNERS
new file mode 100644
index 0000000000..7e98070d5d
--- /dev/null
+++ b/third_party/libwebrtc/api/stats/OWNERS
@@ -0,0 +1,2 @@
+hbos@webrtc.org
+hta@webrtc.org
diff --git a/third_party/libwebrtc/api/stats/rtc_stats.h b/third_party/libwebrtc/api/stats/rtc_stats.h
new file mode 100644
index 0000000000..72775243c7
--- /dev/null
+++ b/third_party/libwebrtc/api/stats/rtc_stats.h
@@ -0,0 +1,580 @@
+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef API_STATS_RTC_STATS_H_
+#define API_STATS_RTC_STATS_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/units/timestamp.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/system/rtc_export.h"
+#include "rtc_base/system/rtc_export_template.h"
+
+namespace webrtc {
+
+class RTCStatsMemberInterface;
+
+// Abstract base class for RTCStats-derived dictionaries, see
+// https://w3c.github.io/webrtc-stats/.
+//
+// All derived classes must have the following static variable defined:
+//   static const char kType[];
+// It is used as a unique class identifier and a string representation of the
+// class type, see https://w3c.github.io/webrtc-stats/#rtcstatstype-str*.
+// Use the `WEBRTC_RTCSTATS_IMPL` macro when implementing subclasses, see macro
+// for details.
+//
+// Derived classes list their dictionary members, RTCStatsMember<T>, as public
+// fields, allowing the following:
+//
+// RTCFooStats foo("fooId", Timestamp::Micros(GetCurrentTime()));
+// foo.bar = 42;
+// foo.baz = std::vector<std::string>();
+// foo.baz->push_back("hello world");
+// uint32_t x = *foo.bar;
+//
+// Pointers to all the members are available with `Members`, allowing iteration:
+//
+// for (const RTCStatsMemberInterface* member : foo.Members()) {
+//   printf("%s = %s\n", member->name(), member->ValueToString().c_str());
+// }
+class RTC_EXPORT RTCStats {
+ public:
+  RTCStats(const std::string& id, Timestamp timestamp)
+      : id_(id), timestamp_(timestamp) {}
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCStats(std::string id, int64_t timestamp_us)
+      : RTCStats(std::move(id), Timestamp::Micros(timestamp_us)) {}
+
+  virtual ~RTCStats() {}
+
+  virtual std::unique_ptr<RTCStats> copy() const = 0;
+
+  const std::string& id() const { return id_; }
+  // Time relative to the UNIX epoch (Jan 1, 1970, UTC), in microseconds.
+  ABSL_DEPRECATED("Use .timestamp().us() instead")
+  int64_t timestamp_us() const { return timestamp_.us(); }
+  Timestamp timestamp() const { return timestamp_; }
+
+  // Returns the static member variable `kType` of the implementing class.
+  virtual const char* type() const = 0;
+  // Returns a vector of pointers to all the `RTCStatsMemberInterface` members
+  // of this class. This allows for iteration of members. For a given class,
+  // `Members` always returns the same members in the same order.
+  std::vector<const RTCStatsMemberInterface*> Members() const;
+  // Checks if the two stats objects are of the same type and have the same
+  // member values. Timestamps are not compared. These operators are exposed for
+  // testing.
+  bool operator==(const RTCStats& other) const;
+  bool operator!=(const RTCStats& other) const;
+
+  // Creates a JSON readable string representation of the stats
+  // object, listing all of its members (names and values).
+  std::string ToJson() const;
+
+  // Downcasts the stats object to an `RTCStats` subclass `T`. DCHECKs that the
+  // object is of type `T`.
+  template <typename T>
+  const T& cast_to() const {
+    RTC_DCHECK_EQ(type(), T::kType);
+    return static_cast<const T&>(*this);
+  }
+
+ protected:
+  // Gets a vector of all members of this `RTCStats` object, including members
+  // derived from parent classes. `additional_capacity` is how many more members
+  // shall be reserved in the vector (so that subclasses can allocate a vector
+  // with room for both parent and child members without it having to resize).
+  virtual std::vector<const RTCStatsMemberInterface*>
+  MembersOfThisObjectAndAncestors(size_t additional_capacity) const;
+
+  std::string const id_;
+  Timestamp timestamp_;
+};
+
+// All `RTCStats` classes should use these macros.
+// `WEBRTC_RTCSTATS_DECL` is placed in a public section of the class definition.
+// `WEBRTC_RTCSTATS_IMPL` is placed outside the class definition (in a .cc).
+//
+// These macros declare (in _DECL) and define (in _IMPL) the static `kType` and
+// overrides methods as required by subclasses of `RTCStats`: `copy`, `type` and
+// `MembersOfThisObjectAndAncestors`. The |...| argument is a list of addresses
+// to each member defined in the implementing class. The list must have at least
+// one member.
+//
+// (Since class names need to be known to implement these methods this cannot be
+// part of the base `RTCStats`. While these methods could be implemented using
+// templates, that would only work for immediate subclasses. Subclasses of
+// subclasses also have to override these methods, resulting in boilerplate
+// code. Using a macro avoids this and works for any `RTCStats` class, including
+// grandchildren.)
+//
+// Sample usage:
+//
+// rtcfoostats.h:
+//   class RTCFooStats : public RTCStats {
+//    public:
+//     WEBRTC_RTCSTATS_DECL();
+//
+//     RTCFooStats(const std::string& id, int64_t timestamp_us);
+//
+//     RTCStatsMember<int32_t> foo;
+//     RTCStatsMember<int32_t> bar;
+//   };
+//
+// rtcfoostats.cc:
+//   WEBRTC_RTCSTATS_IMPL(RTCFooStats, RTCStats, "foo-stats"
+//       &foo,
+//       &bar);
+//
+//   RTCFooStats::RTCFooStats(const std::string& id, int64_t timestamp_us)
+//       : RTCStats(id, timestamp_us),
+//         foo("foo"),
+//         bar("bar") {
+//   }
+//
+#define WEBRTC_RTCSTATS_DECL()                                          \
+ protected:                                                             \
+  std::vector<const webrtc::RTCStatsMemberInterface*>                   \
+  MembersOfThisObjectAndAncestors(size_t local_var_additional_capacity) \
+      const override;                                                   \
+                                                                        \
+ public:                                                                \
+  static const char kType[];                                            \
+                                                                        \
+  std::unique_ptr<webrtc::RTCStats> copy() const override;              \
+  const char* type() const override
+
+#define WEBRTC_RTCSTATS_IMPL(this_class, parent_class, type_str, ...)          \
+  const char this_class::kType[] = type_str;                                   \
+                                                                               \
+  std::unique_ptr<webrtc::RTCStats> this_class::copy() const {                 \
+    return std::make_unique<this_class>(*this);                                \
+  }                                                                            \
+                                                                               \
+  const char* this_class::type() const { return this_class::kType; }           \
+                                                                               \
+  std::vector<const webrtc::RTCStatsMemberInterface*>                          \
+  this_class::MembersOfThisObjectAndAncestors(                                 \
+      size_t local_var_additional_capacity) const {                            \
+    const webrtc::RTCStatsMemberInterface* local_var_members[] = {             \
+        __VA_ARGS__};                                                          \
+    size_t local_var_members_count =                                           \
+        sizeof(local_var_members) / sizeof(local_var_members[0]);              \
+    std::vector<const webrtc::RTCStatsMemberInterface*>                        \
+        local_var_members_vec = parent_class::MembersOfThisObjectAndAncestors( \
+            local_var_members_count + local_var_additional_capacity);          \
+    RTC_DCHECK_GE(                                                             \
+        local_var_members_vec.capacity() - local_var_members_vec.size(),       \
+        local_var_members_count + local_var_additional_capacity);              \
+    local_var_members_vec.insert(local_var_members_vec.end(),                  \
+                                 &local_var_members[0],                        \
+                                 &local_var_members[local_var_members_count]); \
+    return local_var_members_vec;                                              \
+  }
+
+// A version of WEBRTC_RTCSTATS_IMPL() where "..." is omitted, used to avoid a
+// compile error on windows. This is used if the stats dictionary does not
+// declare any members of its own (but perhaps its parent dictionary does).
+#define WEBRTC_RTCSTATS_IMPL_NO_MEMBERS(this_class, parent_class, type_str) \
+  const char this_class::kType[] = type_str;                                \
+                                                                            \
+  std::unique_ptr<webrtc::RTCStats> this_class::copy() const {              \
+    return std::make_unique<this_class>(*this);                             \
+  }                                                                         \
+                                                                            \
+  const char* this_class::type() const { return this_class::kType; }        \
+                                                                            \
+  std::vector<const webrtc::RTCStatsMemberInterface*>                       \
+  this_class::MembersOfThisObjectAndAncestors(                              \
+      size_t local_var_additional_capacity) const {                         \
+    return parent_class::MembersOfThisObjectAndAncestors(0);                \
+  }
+
+// Non-standard stats members can be exposed to the JavaScript API in Chrome
+// e.g. through origin trials. The group ID can be used by the blink layer to
+// determine if a stats member should be exposed or not. Multiple non-standard
+// stats members can share the same group ID so that they are exposed together.
+enum class NonStandardGroupId {
+  // Group ID used for testing purposes only.
+  kGroupIdForTesting,
+  // I2E:
+  // https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/hE2B1iItPDk
+  kRtcAudioJitterBufferMaxPackets,
+  // I2E:
+  // https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/YbhMyqLXXXo
+  kRtcStatsRelativePacketArrivalDelay,
+};
+
+// Certain stat members should only be exposed to the JavaScript API in
+// certain circumstances as to avoid passive fingerprinting.
+enum class StatExposureCriteria : uint8_t {
+  // The stat should always be exposed. This is the default.
+  kAlways,
+  // The stat exposes hardware capabilities and thus should has limited exposure
+  // to JavaScript. The requirements for exposure are written in the spec at
+  // https://w3c.github.io/webrtc-stats/#limiting-exposure-of-hardware-capabilities.
+  kHardwareCapability,
+  // The stat is non-standard so user agents should filter these.
+  kNonStandard,
+};
+
+// Interface for `RTCStats` members, which have a name and a value of a type
+// defined in a subclass. Only the types listed in `Type` are supported, these
+// are implemented by `RTCStatsMember<T>`. The value of a member may be
+// undefined, the value can only be read if `is_defined`.
+class RTCStatsMemberInterface {
+ public:
+  // Member value types.
+  enum Type {
+    kBool,    // bool
+    kInt32,   // int32_t
+    kUint32,  // uint32_t
+    kInt64,   // int64_t
+    kUint64,  // uint64_t
+    kDouble,  // double
+    kString,  // std::string
+
+    kSequenceBool,    // std::vector<bool>
+    kSequenceInt32,   // std::vector<int32_t>
+    kSequenceUint32,  // std::vector<uint32_t>
+    kSequenceInt64,   // std::vector<int64_t>
+    kSequenceUint64,  // std::vector<uint64_t>
+    kSequenceDouble,  // std::vector<double>
+    kSequenceString,  // std::vector<std::string>
+
+    kMapStringUint64,  // std::map<std::string, uint64_t>
+    kMapStringDouble,  // std::map<std::string, double>
+  };
+
+  virtual ~RTCStatsMemberInterface() {}
+
+  const char* name() const { return name_; }
+  virtual Type type() const = 0;
+  virtual bool is_sequence() const = 0;
+  virtual bool is_string() const = 0;
+  virtual bool is_defined() const = 0;
+  // Is this part of the stats spec? Used so that chromium can easily filter
+  // out anything unstandardized.
+  bool is_standardized() const {
+    return exposure_criteria() != StatExposureCriteria::kNonStandard;
+  }
+  // Non-standard stats members can have group IDs in order to be exposed in
+  // JavaScript through experiments. Standardized stats have no group IDs.
+  virtual std::vector<NonStandardGroupId> group_ids() const { return {}; }
+  // The conditions for exposing the statistic to JavaScript. Stats with
+  // criteria that is not kAlways has some restriction and should be filtered
+  // in accordance to the spec.
+  virtual StatExposureCriteria exposure_criteria() const {
+    return StatExposureCriteria::kAlways;
+  }
+  // Type and value comparator. The names are not compared. These operators are
+  // exposed for testing.
+  bool operator==(const RTCStatsMemberInterface& other) const {
+    return IsEqual(other);
+  }
+  bool operator!=(const RTCStatsMemberInterface& other) const {
+    return !(*this == other);
+  }
+  virtual std::string ValueToString() const = 0;
+  // This is the same as ValueToString except for kInt64 and kUint64 types,
+  // where the value is represented as a double instead of as an integer.
+  // Since JSON stores numbers as floating point numbers, very large integers
+  // cannot be accurately represented, so we prefer to display them as doubles
+  // instead.
+  virtual std::string ValueToJson() const = 0;
+
+  template <typename T>
+  const T& cast_to() const {
+    RTC_DCHECK_EQ(type(), T::StaticType());
+    return static_cast<const T&>(*this);
+  }
+
+ protected:
+  explicit RTCStatsMemberInterface(const char* name) : name_(name) {}
+
+  virtual bool IsEqual(const RTCStatsMemberInterface& other) const = 0;
+
+  const char* const name_;
+};
+
+// Template implementation of `RTCStatsMemberInterface`.
+// The supported types are the ones described by
+// `RTCStatsMemberInterface::Type`.
+template <typename T>
+class RTCStatsMember : public RTCStatsMemberInterface {
+ public:
+  explicit RTCStatsMember(const char* name)
+      : RTCStatsMemberInterface(name), value_() {}
+  RTCStatsMember(const char* name, const T& value)
+      : RTCStatsMemberInterface(name), value_(value) {}
+  RTCStatsMember(const char* name, T&& value)
+      : RTCStatsMemberInterface(name), value_(std::move(value)) {}
+  explicit RTCStatsMember(const RTCStatsMember<T>& other)
+      : RTCStatsMemberInterface(other.name_), value_(other.value_) {}
+  explicit RTCStatsMember(RTCStatsMember<T>&& other)
+      : RTCStatsMemberInterface(other.name_), value_(std::move(other.value_)) {}
+
+  static Type StaticType();
+  Type type() const override { return StaticType(); }
+  bool is_sequence() const override;
+  bool is_string() const override;
+  bool is_defined() const override { return value_.has_value(); }
+  std::string ValueToString() const override;
+  std::string ValueToJson() const override;
+
+  template <typename U>
+  inline T ValueOrDefault(U default_value) const {
+    return value_.value_or(default_value);
+  }
+
+  // Assignment operators.
+  T& operator=(const T& value) {
+    value_ = value;
+    return value_.value();
+  }
+  T& operator=(const T&& value) {
+    value_ = std::move(value);
+    return value_.value();
+  }
+
+  // Value getters.
+  T& operator*() {
+    RTC_DCHECK(value_);
+    return *value_;
+  }
+  const T& operator*() const {
+    RTC_DCHECK(value_);
+    return *value_;
+  }
+
+  // Value getters, arrow operator.
+  T* operator->() {
+    RTC_DCHECK(value_);
+    return &(*value_);
+  }
+  const T* operator->() const {
+    RTC_DCHECK(value_);
+    return &(*value_);
+  }
+
+ protected:
+  bool IsEqual(const RTCStatsMemberInterface& other) const override {
+    if (type() != other.type() ||
+        is_standardized() != other.is_standardized() ||
+        exposure_criteria() != other.exposure_criteria())
+      return false;
+    const RTCStatsMember<T>& other_t =
+        static_cast<const RTCStatsMember<T>&>(other);
+    return value_ == other_t.value_;
+  }
+
+ private:
+  absl::optional<T> value_;
+};
+
+namespace rtc_stats_internal {
+
+typedef std::map<std::string, uint64_t> MapStringUint64;
+typedef std::map<std::string, double> MapStringDouble;
+
+}  // namespace rtc_stats_internal
+
+#define WEBRTC_DECLARE_RTCSTATSMEMBER(T)                                    \
+  template <>                                                               \
+  RTC_EXPORT RTCStatsMemberInterface::Type RTCStatsMember<T>::StaticType(); \
+  template <>                                                               \
+  RTC_EXPORT bool RTCStatsMember<T>::is_sequence() const;                   \
+  template <>                                                               \
+  RTC_EXPORT bool RTCStatsMember<T>::is_string() const;                     \
+  template <>                                                               \
+  RTC_EXPORT std::string RTCStatsMember<T>::ValueToString() const;          \
+  template <>                                                               \
+  RTC_EXPORT std::string RTCStatsMember<T>::ValueToJson() const;            \
+  extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)             \
+      RTCStatsMember<T>
+
+WEBRTC_DECLARE_RTCSTATSMEMBER(bool);
+WEBRTC_DECLARE_RTCSTATSMEMBER(int32_t);
+WEBRTC_DECLARE_RTCSTATSMEMBER(uint32_t);
+WEBRTC_DECLARE_RTCSTATSMEMBER(int64_t);
+WEBRTC_DECLARE_RTCSTATSMEMBER(uint64_t);
+WEBRTC_DECLARE_RTCSTATSMEMBER(double);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::string);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<bool>);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<int32_t>);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<uint32_t>);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<int64_t>);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<uint64_t>);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<double>);
+WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<std::string>);
+WEBRTC_DECLARE_RTCSTATSMEMBER(rtc_stats_internal::MapStringUint64);
+WEBRTC_DECLARE_RTCSTATSMEMBER(rtc_stats_internal::MapStringDouble);
+
+// For stats with restricted exposure.
+template <typename T, StatExposureCriteria E>
+class RTCRestrictedStatsMember : public RTCStatsMember<T> {
+ public:
+  explicit RTCRestrictedStatsMember(const char* name)
+      : RTCStatsMember<T>(name) {}
+  RTCRestrictedStatsMember(const char* name, const T& value)
+      : RTCStatsMember<T>(name, value) {}
+  RTCRestrictedStatsMember(const char* name, T&& value)
+      : RTCStatsMember<T>(name, std::move(value)) {}
+  RTCRestrictedStatsMember(const RTCRestrictedStatsMember<T, E>& other)
+      : RTCStatsMember<T>(other) {}
+  RTCRestrictedStatsMember(RTCRestrictedStatsMember<T, E>&& other)
+      : RTCStatsMember<T>(std::move(other)) {}
+
+  StatExposureCriteria exposure_criteria() const override { return E; }
+
+  T& operator=(const T& value) { return RTCStatsMember<T>::operator=(value); }
+  T& operator=(const T&& value) {
+    return RTCStatsMember<T>::operator=(std::move(value));
+  }
+
+ private:
+  static_assert(E != StatExposureCriteria::kAlways,
+                "kAlways is the default exposure criteria. Use "
+                "RTCStatMember<T> instead.");
+};
+
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<bool, StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<int32_t,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<uint32_t,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<int64_t,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<uint64_t,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<double, StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::string,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::vector<bool>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::vector<int32_t>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::vector<uint32_t>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::vector<int64_t>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::vector<uint64_t>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::vector<double>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::vector<std::string>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::map<std::string, uint64_t>,
+                             StatExposureCriteria::kHardwareCapability>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCRestrictedStatsMember<std::map<std::string, double>,
+                             StatExposureCriteria::kHardwareCapability>;
+
+// Using inheritance just so that it's obvious from the member's declaration
+// whether it's standardized or not.
+template <typename T>
+class RTCNonStandardStatsMember
+    : public RTCRestrictedStatsMember<T, StatExposureCriteria::kNonStandard> {
+ public:
+  explicit RTCNonStandardStatsMember(const char* name)
+      : RTCRestrictedStatsBase(name) {}
+  RTCNonStandardStatsMember(const char* name,
+                            std::initializer_list<NonStandardGroupId> group_ids)
+      : RTCRestrictedStatsBase(name), group_ids_(group_ids) {}
+  RTCNonStandardStatsMember(const char* name, const T& value)
+      : RTCRestrictedStatsBase(name, value) {}
+  RTCNonStandardStatsMember(const char* name, T&& value)
+      : RTCRestrictedStatsBase(name, std::move(value)) {}
+  RTCNonStandardStatsMember(const RTCNonStandardStatsMember<T>& other)
+      : RTCRestrictedStatsBase(other), group_ids_(other.group_ids_) {}
+  RTCNonStandardStatsMember(RTCNonStandardStatsMember<T>&& other)
+      : RTCRestrictedStatsBase(std::move(other)),
+        group_ids_(std::move(other.group_ids_)) {}
+
+  std::vector<NonStandardGroupId> group_ids() const override {
+    return group_ids_;
+  }
+
+  T& operator=(const T& value) {
+    return RTCRestrictedStatsMember<
+        T, StatExposureCriteria::kNonStandard>::operator=(value);
+  }
+  T& operator=(const T&& value) {
+    return RTCRestrictedStatsMember<
+        T, StatExposureCriteria::kNonStandard>::operator=(std::move(value));
+  }
+
+ private:
+  using RTCRestrictedStatsBase =
+      RTCRestrictedStatsMember<T, StatExposureCriteria::kNonStandard>;
+  std::vector<NonStandardGroupId> group_ids_;
+};
+
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<bool>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<int32_t>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<uint32_t>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<int64_t>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<uint64_t>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<double>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::string>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::vector<bool>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::vector<int32_t>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::vector<uint32_t>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::vector<int64_t>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::vector<uint64_t>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::vector<double>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::vector<std::string>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::map<std::string, uint64_t>>;
+extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT)
+    RTCNonStandardStatsMember<std::map<std::string, double>>;
+
+}  // namespace webrtc
+
+#endif  // API_STATS_RTC_STATS_H_
diff --git a/third_party/libwebrtc/api/stats/rtc_stats_collector_callback.h b/third_party/libwebrtc/api/stats/rtc_stats_collector_callback.h
new file mode 100644
index 0000000000..506cc63e6f
--- /dev/null
+++ b/third_party/libwebrtc/api/stats/rtc_stats_collector_callback.h
@@ -0,0 +1,30 @@
+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef API_STATS_RTC_STATS_COLLECTOR_CALLBACK_H_
+#define API_STATS_RTC_STATS_COLLECTOR_CALLBACK_H_
+
+#include "api/scoped_refptr.h"
+#include "api/stats/rtc_stats_report.h"
+#include "rtc_base/ref_count.h"
+
+namespace webrtc {
+
+class RTCStatsCollectorCallback : public rtc::RefCountInterface {
+ public:
+  ~RTCStatsCollectorCallback() override = default;
+
+  virtual void OnStatsDelivered(
+      const rtc::scoped_refptr<const RTCStatsReport>& report) = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // API_STATS_RTC_STATS_COLLECTOR_CALLBACK_H_
diff --git a/third_party/libwebrtc/api/stats/rtc_stats_report.h b/third_party/libwebrtc/api/stats/rtc_stats_report.h
new file mode 100644
index 0000000000..1cc6293fec
--- /dev/null
+++ b/third_party/libwebrtc/api/stats/rtc_stats_report.h
@@ -0,0 +1,144 @@
+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef API_STATS_RTC_STATS_REPORT_H_
+#define API_STATS_RTC_STATS_REPORT_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "api/ref_counted_base.h"
+#include "api/scoped_refptr.h"
+#include "api/stats/rtc_stats.h"
+#include "api/units/timestamp.h"
+// TODO(tommi): Remove this include after fixing iwyu issue in chromium.
+// See: third_party/blink/renderer/platform/peerconnection/rtc_stats.cc
+#include "rtc_base/ref_counted_object.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+// A collection of stats.
+// This is accessible as a map from `RTCStats::id` to `RTCStats`.
+class RTC_EXPORT RTCStatsReport final
+    : public rtc::RefCountedNonVirtual<RTCStatsReport> {
+ public:
+  typedef std::map<std::string, std::unique_ptr<const RTCStats>> StatsMap;
+
+  class RTC_EXPORT ConstIterator {
+   public:
+    ConstIterator(ConstIterator&& other);
+    ~ConstIterator();
+
+    ConstIterator& operator++();
+    ConstIterator& operator++(int);
+    const RTCStats& operator*() const;
+    const RTCStats* operator->() const;
+    bool operator==(const ConstIterator& other) const;
+    bool operator!=(const ConstIterator& other) const;
+
+   private:
+    friend class RTCStatsReport;
+    ConstIterator(const rtc::scoped_refptr<const RTCStatsReport>& report,
+                  StatsMap::const_iterator it);
+
+    // Reference report to make sure it is kept alive.
+    rtc::scoped_refptr<const RTCStatsReport> report_;
+    StatsMap::const_iterator it_;
+  };
+
+  // TODO(bugs.webrtc.org/13756): deprecate this in favor of Timestamp.
+  // TODO(hbos): Remove "= 0" once downstream has been updated to call with a
+  // parameter.
+  static rtc::scoped_refptr<RTCStatsReport> Create(int64_t timestamp_us = 0);
+  static rtc::scoped_refptr<RTCStatsReport> Create(Timestamp timestamp);
+
+  // TODO(bugs.webrtc.org/13756): deprecate this in favor of Timestamp.
+  explicit RTCStatsReport(int64_t timestamp_us);
+  explicit RTCStatsReport(Timestamp timestamp);
+
+  RTCStatsReport(const RTCStatsReport& other) = delete;
+  rtc::scoped_refptr<RTCStatsReport> Copy() const;
+
+  int64_t timestamp_us() const { return timestamp_.us_or(-1); }
+  Timestamp timestamp() const { return timestamp_; }
+  void AddStats(std::unique_ptr<const RTCStats> stats);
+  // On success, returns a non-owning pointer to `stats`. If the stats ID is not
+  // unique, `stats` is not inserted and nullptr is returned.
+  template <typename T>
+  T* TryAddStats(std::unique_ptr<T> stats) {
+    T* stats_ptr = stats.get();
+    if (!stats_
+             .insert(std::make_pair(std::string(stats->id()), std::move(stats)))
+             .second) {
+      return nullptr;
+    }
+    return stats_ptr;
+  }
+  const RTCStats* Get(const std::string& id) const;
+  size_t size() const { return stats_.size(); }
+
+  // Gets the stat object of type `T` by ID, where `T` is any class descending
+  // from `RTCStats`.
+  // Returns null if there is no stats object for the given ID or it is the
+  // wrong type.
+  template <typename T>
+  const T* GetAs(const std::string& id) const {
+    const RTCStats* stats = Get(id);
+    if (!stats || stats->type() != T::kType) {
+      return nullptr;
+    }
+    return &stats->cast_to<const T>();
+  }
+
+  // Removes the stats object from the report, returning ownership of it or null
+  // if there is no object with `id`.
+  std::unique_ptr<const RTCStats> Take(const std::string& id);
+  // Takes ownership of all the stats in `other`, leaving it empty.
+  void TakeMembersFrom(rtc::scoped_refptr<RTCStatsReport> other);
+
+  // Stats iterators. Stats are ordered lexicographically on `RTCStats::id`.
+  ConstIterator begin() const;
+  ConstIterator end() const;
+
+  // Gets the subset of stats that are of type `T`, where `T` is any class
+  // descending from `RTCStats`.
+  template <typename T>
+  std::vector<const T*> GetStatsOfType() const {
+    std::vector<const T*> stats_of_type;
+    for (const RTCStats& stats : *this) {
+      if (stats.type() == T::kType)
+        stats_of_type.push_back(&stats.cast_to<const T>());
+    }
+    return stats_of_type;
+  }
+
+  // Creates a JSON readable string representation of the report,
+  // listing all of its stats objects.
+  std::string ToJson() const;
+
+ protected:
+  friend class rtc::RefCountedNonVirtual<RTCStatsReport>;
+  ~RTCStatsReport() = default;
+
+ private:
+  Timestamp timestamp_;
+  StatsMap stats_;
+};
+
+}  // namespace webrtc
+
+#endif  // API_STATS_RTC_STATS_REPORT_H_
diff --git a/third_party/libwebrtc/api/stats/rtcstats_objects.h b/third_party/libwebrtc/api/stats/rtcstats_objects.h
new file mode 100644
index 0000000000..e5de2100bb
--- /dev/null
+++ b/third_party/libwebrtc/api/stats/rtcstats_objects.h
@@ -0,0 +1,722 @@
+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef API_STATS_RTCSTATS_OBJECTS_H_
+#define API_STATS_RTCSTATS_OBJECTS_H_
+
+#include <stdint.h>
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "api/stats/rtc_stats.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+// https://w3c.github.io/webrtc-pc/#idl-def-rtcdatachannelstate
+struct RTCDataChannelState {
+  static const char* const kConnecting;
+  static const char* const kOpen;
+  static const char* const kClosing;
+  static const char* const kClosed;
+};
+
+// https://w3c.github.io/webrtc-stats/#dom-rtcstatsicecandidatepairstate
+struct RTCStatsIceCandidatePairState {
+  static const char* const kFrozen;
+  static const char* const kWaiting;
+  static const char* const kInProgress;
+  static const char* const kFailed;
+  static const char* const kSucceeded;
+};
+
+// https://w3c.github.io/webrtc-pc/#rtcicecandidatetype-enum
+struct RTCIceCandidateType {
+  static const char* const kHost;
+  static const char* const kSrflx;
+  static const char* const kPrflx;
+  static const char* const kRelay;
+};
+
+// https://w3c.github.io/webrtc-pc/#idl-def-rtcdtlstransportstate
+struct RTCDtlsTransportState {
+  static const char* const kNew;
+  static const char* const kConnecting;
+  static const char* const kConnected;
+  static const char* const kClosed;
+  static const char* const kFailed;
+};
+
+// `RTCMediaStreamTrackStats::kind` is not an enum in the spec but the only
+// valid values are "audio" and "video".
+// https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamtrackstats-kind
+struct RTCMediaStreamTrackKind {
+  static const char* const kAudio;
+  static const char* const kVideo;
+};
+
+// https://w3c.github.io/webrtc-stats/#dom-rtcnetworktype
+struct RTCNetworkType {
+  static const char* const kBluetooth;
+  static const char* const kCellular;
+  static const char* const kEthernet;
+  static const char* const kWifi;
+  static const char* const kWimax;
+  static const char* const kVpn;
+  static const char* const kUnknown;
+};
+
+// https://w3c.github.io/webrtc-stats/#dom-rtcqualitylimitationreason
+struct RTCQualityLimitationReason {
+  static const char* const kNone;
+  static const char* const kCpu;
+  static const char* const kBandwidth;
+  static const char* const kOther;
+};
+
+// https://webrtc.org/experiments/rtp-hdrext/video-content-type/
+struct RTCContentType {
+  static const char* const kUnspecified;
+  static const char* const kScreenshare;
+};
+
+// https://w3c.github.io/webrtc-stats/#dom-rtcdtlsrole
+struct RTCDtlsRole {
+  static const char* const kUnknown;
+  static const char* const kClient;
+  static const char* const kServer;
+};
+
+// https://www.w3.org/TR/webrtc/#rtcicerole
+struct RTCIceRole {
+  static const char* const kUnknown;
+  static const char* const kControlled;
+  static const char* const kControlling;
+};
+
+// https://www.w3.org/TR/webrtc/#dom-rtcicetransportstate
+struct RTCIceTransportState {
+  static const char* const kNew;
+  static const char* const kChecking;
+  static const char* const kConnected;
+  static const char* const kCompleted;
+  static const char* const kDisconnected;
+  static const char* const kFailed;
+  static const char* const kClosed;
+};
+
+// https://w3c.github.io/webrtc-stats/#certificatestats-dict*
+class RTC_EXPORT RTCCertificateStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCCertificateStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCCertificateStats(std::string id, int64_t timestamp_us);
+  RTCCertificateStats(const RTCCertificateStats& other);
+  ~RTCCertificateStats() override;
+
+  RTCStatsMember<std::string> fingerprint;
+  RTCStatsMember<std::string> fingerprint_algorithm;
+  RTCStatsMember<std::string> base64_certificate;
+  RTCStatsMember<std::string> issuer_certificate_id;
+};
+
+// Non standard extension mapping to rtc::AdapterType
+struct RTCNetworkAdapterType {
+  static constexpr char kUnknown[] = "unknown";
+  static constexpr char kEthernet[] = "ethernet";
+  static constexpr char kWifi[] = "wifi";
+  static constexpr char kCellular[] = "cellular";
+  static constexpr char kLoopback[] = "loopback";
+  static constexpr char kAny[] = "any";
+  static constexpr char kCellular2g[] = "cellular2g";
+  static constexpr char kCellular3g[] = "cellular3g";
+  static constexpr char kCellular4g[] = "cellular4g";
+  static constexpr char kCellular5g[] = "cellular5g";
+};
+
+// https://w3c.github.io/webrtc-stats/#codec-dict*
+class RTC_EXPORT RTCCodecStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCCodecStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCCodecStats(std::string id, int64_t timestamp_us);
+  RTCCodecStats(const RTCCodecStats& other);
+  ~RTCCodecStats() override;
+
+  RTCStatsMember<std::string> transport_id;
+  RTCStatsMember<uint32_t> payload_type;
+  RTCStatsMember<std::string> mime_type;
+  RTCStatsMember<uint32_t> clock_rate;
+  RTCStatsMember<uint32_t> channels;
+  RTCStatsMember<std::string> sdp_fmtp_line;
+};
+
+// https://w3c.github.io/webrtc-stats/#dcstats-dict*
+class RTC_EXPORT RTCDataChannelStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCDataChannelStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCDataChannelStats(std::string id, int64_t timestamp_us);
+  RTCDataChannelStats(const RTCDataChannelStats& other);
+  ~RTCDataChannelStats() override;
+
+  RTCStatsMember<std::string> label;
+  RTCStatsMember<std::string> protocol;
+  RTCStatsMember<int32_t> data_channel_identifier;
+  // Enum type RTCDataChannelState.
+  RTCStatsMember<std::string> state;
+  RTCStatsMember<uint32_t> messages_sent;
+  RTCStatsMember<uint64_t> bytes_sent;
+  RTCStatsMember<uint32_t> messages_received;
+  RTCStatsMember<uint64_t> bytes_received;
+};
+
+// https://w3c.github.io/webrtc-stats/#candidatepair-dict*
+class RTC_EXPORT RTCIceCandidatePairStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCIceCandidatePairStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCIceCandidatePairStats(std::string id, int64_t timestamp_us);
+  RTCIceCandidatePairStats(const RTCIceCandidatePairStats& other);
+  ~RTCIceCandidatePairStats() override;
+
+  RTCStatsMember<std::string> transport_id;
+  RTCStatsMember<std::string> local_candidate_id;
+  RTCStatsMember<std::string> remote_candidate_id;
+  // Enum type RTCStatsIceCandidatePairState.
+  RTCStatsMember<std::string> state;
+  // Obsolete: priority
+  RTCStatsMember<uint64_t> priority;
+  RTCStatsMember<bool> nominated;
+  // `writable` does not exist in the spec and old comments suggest it used to
+  // exist but was incorrectly implemented.
+  // TODO(https://crbug.com/webrtc/14171): Standardize and/or modify
+  // implementation.
+  RTCStatsMember<bool> writable;
+  RTCStatsMember<uint64_t> packets_sent;
+  RTCStatsMember<uint64_t> packets_received;
+  RTCStatsMember<uint64_t> bytes_sent;
+  RTCStatsMember<uint64_t> bytes_received;
+  RTCStatsMember<double> total_round_trip_time;
+  RTCStatsMember<double> current_round_trip_time;
+  RTCStatsMember<double> available_outgoing_bitrate;
+  RTCStatsMember<double> available_incoming_bitrate;
+  RTCStatsMember<uint64_t> requests_received;
+  RTCStatsMember<uint64_t> requests_sent;
+  RTCStatsMember<uint64_t> responses_received;
+  RTCStatsMember<uint64_t> responses_sent;
+  RTCStatsMember<uint64_t> consent_requests_sent;
+  RTCStatsMember<uint64_t> packets_discarded_on_send;
+  RTCStatsMember<uint64_t> bytes_discarded_on_send;
+  RTCStatsMember<double> last_packet_received_timestamp;
+  RTCStatsMember<double> last_packet_sent_timestamp;
+};
+
+// https://w3c.github.io/webrtc-stats/#icecandidate-dict*
+class RTC_EXPORT RTCIceCandidateStats : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCIceCandidateStats(const RTCIceCandidateStats& other);
+  ~RTCIceCandidateStats() override;
+
+  RTCStatsMember<std::string> transport_id;
+  // Obsolete: is_remote
+  RTCStatsMember<bool> is_remote;
+  RTCStatsMember<std::string> network_type;
+  RTCStatsMember<std::string> ip;
+  RTCStatsMember<std::string> address;
+  RTCStatsMember<int32_t> port;
+  RTCStatsMember<std::string> protocol;
+  RTCStatsMember<std::string> relay_protocol;
+  // Enum type RTCIceCandidateType.
+  RTCStatsMember<std::string> candidate_type;
+  RTCStatsMember<int32_t> priority;
+  RTCStatsMember<std::string> url;
+  RTCStatsMember<std::string> foundation;
+  RTCStatsMember<std::string> related_address;
+  RTCStatsMember<int32_t> related_port;
+  RTCStatsMember<std::string> username_fragment;
+  // Enum type RTCIceTcpCandidateType.
+  RTCStatsMember<std::string> tcp_type;
+
+  RTCNonStandardStatsMember<bool> vpn;
+  RTCNonStandardStatsMember<std::string> network_adapter_type;
+
+ protected:
+  RTCIceCandidateStats(std::string id, Timestamp timestamp, bool is_remote);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCIceCandidateStats(std::string id, int64_t timestamp_us, bool is_remote);
+};
+
+// In the spec both local and remote varieties are of type RTCIceCandidateStats.
+// But here we define them as subclasses of `RTCIceCandidateStats` because the
+// `kType` need to be different ("RTCStatsType type") in the local/remote case.
+// https://w3c.github.io/webrtc-stats/#rtcstatstype-str*
+// This forces us to have to override copy() and type().
+class RTC_EXPORT RTCLocalIceCandidateStats final : public RTCIceCandidateStats {
+ public:
+  static const char kType[];
+  RTCLocalIceCandidateStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCLocalIceCandidateStats(std::string id, int64_t timestamp_us);
+  std::unique_ptr<RTCStats> copy() const override;
+  const char* type() const override;
+};
+
+class RTC_EXPORT RTCRemoteIceCandidateStats final
+    : public RTCIceCandidateStats {
+ public:
+  static const char kType[];
+  RTCRemoteIceCandidateStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCRemoteIceCandidateStats(std::string id, int64_t timestamp_us);
+  std::unique_ptr<RTCStats> copy() const override;
+  const char* type() const override;
+};
+
+// TODO(https://crbug.com/webrtc/14419): Delete this class, it's deprecated.
+class RTC_EXPORT DEPRECATED_RTCMediaStreamStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  DEPRECATED_RTCMediaStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  DEPRECATED_RTCMediaStreamStats(std::string id, int64_t timestamp_us);
+  DEPRECATED_RTCMediaStreamStats(const DEPRECATED_RTCMediaStreamStats& other);
+  ~DEPRECATED_RTCMediaStreamStats() override;
+
+  RTCStatsMember<std::string> stream_identifier;
+  RTCStatsMember<std::vector<std::string>> track_ids;
+};
+using RTCMediaStreamStats [[deprecated("bugs.webrtc.org/14419")]] =
+    DEPRECATED_RTCMediaStreamStats;
+
+// TODO(https://crbug.com/webrtc/14175): Delete this class, it's deprecated.
+class RTC_EXPORT DEPRECATED_RTCMediaStreamTrackStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  DEPRECATED_RTCMediaStreamTrackStats(std::string id,
+                                      Timestamp timestamp,
+                                      const char* kind);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  DEPRECATED_RTCMediaStreamTrackStats(std::string id,
+                                      int64_t timestamp_us,
+                                      const char* kind);
+  DEPRECATED_RTCMediaStreamTrackStats(
+      const DEPRECATED_RTCMediaStreamTrackStats& other);
+  ~DEPRECATED_RTCMediaStreamTrackStats() override;
+
+  RTCStatsMember<std::string> track_identifier;
+  RTCStatsMember<std::string> media_source_id;
+  RTCStatsMember<bool> remote_source;
+  RTCStatsMember<bool> ended;
+  // TODO(https://crbug.com/webrtc/14173): Remove this obsolete metric.
+  RTCStatsMember<bool> detached;
+  // Enum type RTCMediaStreamTrackKind.
+  RTCStatsMember<std::string> kind;
+  RTCStatsMember<double> jitter_buffer_delay;
+  RTCStatsMember<uint64_t> jitter_buffer_emitted_count;
+  // Video-only members
+  RTCStatsMember<uint32_t> frame_width;
+  RTCStatsMember<uint32_t> frame_height;
+  RTCStatsMember<uint32_t> frames_sent;
+  RTCStatsMember<uint32_t> huge_frames_sent;
+  RTCStatsMember<uint32_t> frames_received;
+  RTCStatsMember<uint32_t> frames_decoded;
+  RTCStatsMember<uint32_t> frames_dropped;
+  // Audio-only members
+  RTCStatsMember<double> audio_level;         // Receive-only
+  RTCStatsMember<double> total_audio_energy;  // Receive-only
+  RTCStatsMember<double> echo_return_loss;
+  RTCStatsMember<double> echo_return_loss_enhancement;
+  RTCStatsMember<uint64_t> total_samples_received;
+  RTCStatsMember<double> total_samples_duration;  // Receive-only
+  RTCStatsMember<uint64_t> concealed_samples;
+  RTCStatsMember<uint64_t> silent_concealed_samples;
+  RTCStatsMember<uint64_t> concealment_events;
+  RTCStatsMember<uint64_t> inserted_samples_for_deceleration;
+  RTCStatsMember<uint64_t> removed_samples_for_acceleration;
+};
+using RTCMediaStreamTrackStats [[deprecated("bugs.webrtc.org/14175")]] =
+    DEPRECATED_RTCMediaStreamTrackStats;
+
+// https://w3c.github.io/webrtc-stats/#pcstats-dict*
+class RTC_EXPORT RTCPeerConnectionStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCPeerConnectionStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCPeerConnectionStats(std::string id, int64_t timestamp_us);
+  RTCPeerConnectionStats(const RTCPeerConnectionStats& other);
+  ~RTCPeerConnectionStats() override;
+
+  RTCStatsMember<uint32_t> data_channels_opened;
+  RTCStatsMember<uint32_t> data_channels_closed;
+};
+
+// https://w3c.github.io/webrtc-stats/#streamstats-dict*
+class RTC_EXPORT RTCRTPStreamStats : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCRTPStreamStats(const RTCRTPStreamStats& other);
+  ~RTCRTPStreamStats() override;
+
+  RTCStatsMember<uint32_t> ssrc;
+  RTCStatsMember<std::string> kind;
+  // Obsolete: track_id
+  RTCStatsMember<std::string> track_id;
+  RTCStatsMember<std::string> transport_id;
+  RTCStatsMember<std::string> codec_id;
+
+  // Obsolete
+  RTCStatsMember<std::string> media_type;  // renamed to kind.
+
+ protected:
+  RTCRTPStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCRTPStreamStats(std::string id, int64_t timestamp_us);
+};
+
+// https://www.w3.org/TR/webrtc-stats/#receivedrtpstats-dict*
+class RTC_EXPORT RTCReceivedRtpStreamStats : public RTCRTPStreamStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCReceivedRtpStreamStats(const RTCReceivedRtpStreamStats& other);
+  ~RTCReceivedRtpStreamStats() override;
+
+  RTCStatsMember<double> jitter;
+  RTCStatsMember<int32_t> packets_lost;  // Signed per RFC 3550
+
+ protected:
+  RTCReceivedRtpStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCReceivedRtpStreamStats(std::string id, int64_t timestamp_us);
+};
+
+// https://www.w3.org/TR/webrtc-stats/#sentrtpstats-dict*
+class RTC_EXPORT RTCSentRtpStreamStats : public RTCRTPStreamStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCSentRtpStreamStats(const RTCSentRtpStreamStats& other);
+  ~RTCSentRtpStreamStats() override;
+
+  RTCStatsMember<uint32_t> packets_sent;
+  RTCStatsMember<uint64_t> bytes_sent;
+
+ protected:
+  RTCSentRtpStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCSentRtpStreamStats(std::string id, int64_t timestamp_us);
+};
+
+// https://w3c.github.io/webrtc-stats/#inboundrtpstats-dict*
+class RTC_EXPORT RTCInboundRTPStreamStats final
+    : public RTCReceivedRtpStreamStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCInboundRTPStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCInboundRTPStreamStats(std::string id, int64_t timestamp_us);
+  RTCInboundRTPStreamStats(const RTCInboundRTPStreamStats& other);
+  ~RTCInboundRTPStreamStats() override;
+
+  // TODO(https://crbug.com/webrtc/14174): Implement trackIdentifier and kind.
+
+  RTCStatsMember<std::string> playout_id;
+  RTCStatsMember<std::string> track_identifier;
+  RTCStatsMember<std::string> mid;
+  RTCStatsMember<std::string> remote_id;
+  RTCStatsMember<uint32_t> packets_received;
+  RTCStatsMember<uint64_t> packets_discarded;
+  RTCStatsMember<uint64_t> fec_packets_received;
+  RTCStatsMember<uint64_t> fec_packets_discarded;
+  RTCStatsMember<uint64_t> bytes_received;
+  RTCStatsMember<uint64_t> header_bytes_received;
+  RTCStatsMember<double> last_packet_received_timestamp;
+  RTCStatsMember<double> jitter_buffer_delay;
+  RTCStatsMember<double> jitter_buffer_target_delay;
+  RTCStatsMember<double> jitter_buffer_minimum_delay;
+  RTCStatsMember<uint64_t> jitter_buffer_emitted_count;
+  RTCStatsMember<uint64_t> total_samples_received;
+  RTCStatsMember<uint64_t> concealed_samples;
+  RTCStatsMember<uint64_t> silent_concealed_samples;
+  RTCStatsMember<uint64_t> concealment_events;
+  RTCStatsMember<uint64_t> inserted_samples_for_deceleration;
+  RTCStatsMember<uint64_t> removed_samples_for_acceleration;
+  RTCStatsMember<double> audio_level;
+  RTCStatsMember<double> total_audio_energy;
+  RTCStatsMember<double> total_samples_duration;
+  // Stats below are only implemented or defined for video.
+  RTCStatsMember<int32_t> frames_received;
+  RTCStatsMember<uint32_t> frame_width;
+  RTCStatsMember<uint32_t> frame_height;
+  RTCStatsMember<double> frames_per_second;
+  RTCStatsMember<uint32_t> frames_decoded;
+  RTCStatsMember<uint32_t> key_frames_decoded;
+  RTCStatsMember<uint32_t> frames_dropped;
+  RTCStatsMember<double> total_decode_time;
+  RTCStatsMember<double> total_processing_delay;
+  RTCStatsMember<double> total_assembly_time;
+  RTCStatsMember<uint32_t> frames_assembled_from_multiple_packets;
+  RTCStatsMember<double> total_inter_frame_delay;
+  RTCStatsMember<double> total_squared_inter_frame_delay;
+  RTCStatsMember<uint32_t> pause_count;
+  RTCStatsMember<double> total_pauses_duration;
+  RTCStatsMember<uint32_t> freeze_count;
+  RTCStatsMember<double> total_freezes_duration;
+  // https://w3c.github.io/webrtc-provisional-stats/#dom-rtcinboundrtpstreamstats-contenttype
+  RTCStatsMember<std::string> content_type;
+  // Only populated if audio/video sync is enabled.
+  // TODO(https://crbug.com/webrtc/14177): Expose even if A/V sync is off?
+  RTCStatsMember<double> estimated_playout_timestamp;
+  // Only implemented for video.
+  // TODO(https://crbug.com/webrtc/14178): Also implement for audio.
+  RTCRestrictedStatsMember<std::string,
+                           StatExposureCriteria::kHardwareCapability>
+      decoder_implementation;
+  // FIR and PLI counts are only defined for |kind == "video"|.
+  RTCStatsMember<uint32_t> fir_count;
+  RTCStatsMember<uint32_t> pli_count;
+  RTCStatsMember<uint32_t> nack_count;
+  RTCStatsMember<uint64_t> qp_sum;
+  // This is a remnant of the legacy getStats() API. When the "video-timing"
+  // header extension is used,
+  // https://webrtc.github.io/webrtc-org/experiments/rtp-hdrext/video-timing/,
+  // `googTimingFrameInfo` is exposed with the value of
+  // TimingFrameInfo::ToString().
+  // TODO(https://crbug.com/webrtc/14586): Unship or standardize this metric.
+  RTCStatsMember<std::string> goog_timing_frame_info;
+  RTCRestrictedStatsMember<bool, StatExposureCriteria::kHardwareCapability>
+      power_efficient_decoder;
+  // Non-standard audio metrics.
+  RTCNonStandardStatsMember<uint64_t> jitter_buffer_flushes;
+  RTCNonStandardStatsMember<uint64_t> delayed_packet_outage_samples;
+  RTCNonStandardStatsMember<double> relative_packet_arrival_delay;
+  RTCNonStandardStatsMember<uint32_t> interruption_count;
+  RTCNonStandardStatsMember<double> total_interruption_duration;
+
+  // The former googMinPlayoutDelayMs (in seconds).
+  RTCNonStandardStatsMember<double> min_playout_delay;
+};
+
+// https://w3c.github.io/webrtc-stats/#outboundrtpstats-dict*
+class RTC_EXPORT RTCOutboundRTPStreamStats final : public RTCRTPStreamStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCOutboundRTPStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCOutboundRTPStreamStats(std::string id, int64_t timestamp_us);
+  RTCOutboundRTPStreamStats(const RTCOutboundRTPStreamStats& other);
+  ~RTCOutboundRTPStreamStats() override;
+
+  RTCStatsMember<std::string> media_source_id;
+  RTCStatsMember<std::string> remote_id;
+  RTCStatsMember<std::string> mid;
+  RTCStatsMember<std::string> rid;
+  RTCStatsMember<uint32_t> packets_sent;
+  RTCStatsMember<uint64_t> retransmitted_packets_sent;
+  RTCStatsMember<uint64_t> bytes_sent;
+  RTCStatsMember<uint64_t> header_bytes_sent;
+  RTCStatsMember<uint64_t> retransmitted_bytes_sent;
+  RTCStatsMember<double> target_bitrate;
+  RTCStatsMember<uint32_t> frames_encoded;
+  RTCStatsMember<uint32_t> key_frames_encoded;
+  RTCStatsMember<double> total_encode_time;
+  RTCStatsMember<uint64_t> total_encoded_bytes_target;
+  RTCStatsMember<uint32_t> frame_width;
+  RTCStatsMember<uint32_t> frame_height;
+  RTCStatsMember<double> frames_per_second;
+  RTCStatsMember<uint32_t> frames_sent;
+  RTCStatsMember<uint32_t> huge_frames_sent;
+  RTCStatsMember<double> total_packet_send_delay;
+  // Enum type RTCQualityLimitationReason
+  RTCStatsMember<std::string> quality_limitation_reason;
+  RTCStatsMember<std::map<std::string, double>> quality_limitation_durations;
+  // https://w3c.github.io/webrtc-stats/#dom-rtcoutboundrtpstreamstats-qualitylimitationresolutionchanges
+  RTCStatsMember<uint32_t> quality_limitation_resolution_changes;
+  // https://w3c.github.io/webrtc-provisional-stats/#dom-rtcoutboundrtpstreamstats-contenttype
+  RTCStatsMember<std::string> content_type;
+  // Only implemented for video.
+  // TODO(https://crbug.com/webrtc/14178): Implement for audio as well.
+  RTCRestrictedStatsMember<std::string,
+                           StatExposureCriteria::kHardwareCapability>
+      encoder_implementation;
+  // FIR and PLI counts are only defined for |kind == "video"|.
+  RTCStatsMember<uint32_t> fir_count;
+  RTCStatsMember<uint32_t> pli_count;
+  RTCStatsMember<uint32_t> nack_count;
+  RTCStatsMember<uint64_t> qp_sum;
+  RTCStatsMember<bool> active;
+  RTCRestrictedStatsMember<bool, StatExposureCriteria::kHardwareCapability>
+      power_efficient_encoder;
+  RTCStatsMember<std::string> scalability_mode;
+};
+
+// https://w3c.github.io/webrtc-stats/#remoteinboundrtpstats-dict*
+class RTC_EXPORT RTCRemoteInboundRtpStreamStats final
+    : public RTCReceivedRtpStreamStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCRemoteInboundRtpStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCRemoteInboundRtpStreamStats(std::string id, int64_t timestamp_us);
+  RTCRemoteInboundRtpStreamStats(const RTCRemoteInboundRtpStreamStats& other);
+  ~RTCRemoteInboundRtpStreamStats() override;
+
+  RTCStatsMember<std::string> local_id;
+  RTCStatsMember<double> round_trip_time;
+  RTCStatsMember<double> fraction_lost;
+  RTCStatsMember<double> total_round_trip_time;
+  RTCStatsMember<int32_t> round_trip_time_measurements;
+};
+
+// https://w3c.github.io/webrtc-stats/#remoteoutboundrtpstats-dict*
+class RTC_EXPORT RTCRemoteOutboundRtpStreamStats final
+    : public RTCSentRtpStreamStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCRemoteOutboundRtpStreamStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCRemoteOutboundRtpStreamStats(std::string id, int64_t timestamp_us);
+  RTCRemoteOutboundRtpStreamStats(const RTCRemoteOutboundRtpStreamStats& other);
+  ~RTCRemoteOutboundRtpStreamStats() override;
+
+  RTCStatsMember<std::string> local_id;
+  RTCStatsMember<double> remote_timestamp;
+  RTCStatsMember<uint64_t> reports_sent;
+  RTCStatsMember<double> round_trip_time;
+  RTCStatsMember<uint64_t> round_trip_time_measurements;
+  RTCStatsMember<double> total_round_trip_time;
+};
+
+// https://w3c.github.io/webrtc-stats/#dom-rtcmediasourcestats
+class RTC_EXPORT RTCMediaSourceStats : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCMediaSourceStats(const RTCMediaSourceStats& other);
+  ~RTCMediaSourceStats() override;
+
+  RTCStatsMember<std::string> track_identifier;
+  RTCStatsMember<std::string> kind;
+
+ protected:
+  RTCMediaSourceStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCMediaSourceStats(std::string id, int64_t timestamp_us);
+};
+
+// https://w3c.github.io/webrtc-stats/#dom-rtcaudiosourcestats
+class RTC_EXPORT RTCAudioSourceStats final : public RTCMediaSourceStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCAudioSourceStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCAudioSourceStats(std::string id, int64_t timestamp_us);
+  RTCAudioSourceStats(const RTCAudioSourceStats& other);
+  ~RTCAudioSourceStats() override;
+
+  RTCStatsMember<double> audio_level;
+  RTCStatsMember<double> total_audio_energy;
+  RTCStatsMember<double> total_samples_duration;
+  RTCStatsMember<double> echo_return_loss;
+  RTCStatsMember<double> echo_return_loss_enhancement;
+};
+
+// https://w3c.github.io/webrtc-stats/#dom-rtcvideosourcestats
+class RTC_EXPORT RTCVideoSourceStats final : public RTCMediaSourceStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCVideoSourceStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCVideoSourceStats(std::string id, int64_t timestamp_us);
+  RTCVideoSourceStats(const RTCVideoSourceStats& other);
+  ~RTCVideoSourceStats() override;
+
+  RTCStatsMember<uint32_t> width;
+  RTCStatsMember<uint32_t> height;
+  RTCStatsMember<uint32_t> frames;
+  RTCStatsMember<double> frames_per_second;
+};
+
+// https://w3c.github.io/webrtc-stats/#transportstats-dict*
+class RTC_EXPORT RTCTransportStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCTransportStats(std::string id, Timestamp timestamp);
+  ABSL_DEPRECATED("Use constructor with Timestamp instead")
+  RTCTransportStats(std::string id, int64_t timestamp_us);
+  RTCTransportStats(const RTCTransportStats& other);
+  ~RTCTransportStats() override;
+
+  RTCStatsMember<uint64_t> bytes_sent;
+  RTCStatsMember<uint64_t> packets_sent;
+  RTCStatsMember<uint64_t> bytes_received;
+  RTCStatsMember<uint64_t> packets_received;
+  RTCStatsMember<std::string> rtcp_transport_stats_id;
+  // Enum type RTCDtlsTransportState.
+  RTCStatsMember<std::string> dtls_state;
+  RTCStatsMember<std::string> selected_candidate_pair_id;
+  RTCStatsMember<std::string> local_certificate_id;
+  RTCStatsMember<std::string> remote_certificate_id;
+  RTCStatsMember<std::string> tls_version;
+  RTCStatsMember<std::string> dtls_cipher;
+  RTCStatsMember<std::string> dtls_role;
+  RTCStatsMember<std::string> srtp_cipher;
+  RTCStatsMember<uint32_t> selected_candidate_pair_changes;
+  RTCStatsMember<std::string> ice_role;
+  RTCStatsMember<std::string> ice_local_username_fragment;
+  RTCStatsMember<std::string> ice_state;
+};
+
+// https://w3c.github.io/webrtc-stats/#playoutstats-dict*
+class RTC_EXPORT RTCAudioPlayoutStats final : public RTCStats {
+ public:
+  WEBRTC_RTCSTATS_DECL();
+
+  RTCAudioPlayoutStats(const std::string& id, Timestamp timestamp);
+  RTCAudioPlayoutStats(const RTCAudioPlayoutStats& other);
+  ~RTCAudioPlayoutStats() override;
+
+  RTCStatsMember<std::string> kind;
+  RTCStatsMember<double> synthesized_samples_duration;
+  RTCStatsMember<uint64_t> synthesized_samples_events;
+  RTCStatsMember<double> total_samples_duration;
+  RTCStatsMember<double> total_playout_delay;
+  RTCStatsMember<uint64_t> total_samples_count;
+};
+
+}  // namespace webrtc
+
+#endif  // API_STATS_RTCSTATS_OBJECTS_H_